Plow draft device



p 8, 1953 l R. E. HARTSbCK ET AL 2,651,247

PLOW DRAFT DEVICE Original Filed July s, 1943 Patented Sept. 8, 1953Robert E. Hartsock, La Habra,

and Richard W.

Henss, South Gate, Calif., assignors to J. I.

Case Company, Racine, Wis,

Wisconsin a corporation of Original application July 8, 1943, Serial No.

tember 2'7, 1949.

September .26, 1949, Serial No. 117,925

2 Claims. (Cl. 9746.65)

This invention relates to tractors and particularly to the type ofmachine which carries implements at the rear thereof. This applicationis a division of application Serial No. 493,852, filed July 8, 1943, nowPatent No. 2,482,751, issued September 27,1949, for Tractor Implementsand Control.

Agricultural machines are commonly equipped with mechanism for raisingand lowering the tools at the end of the row and for these purposes ithas been customary to employ mechanisms at the rear of the tractorincluding rock shafts, reach rods and the like above and at the sides ofthe tractor platform. These mechanisms not only encumber the platformand interfere to some extent with the operation and control of thetractor, but also constitute a hazard to the tractor operator since theywould be moved with considerable force whenever the power lift mechanismis operated.

The principal object of this invention is to provide an arrangement formounting a plow or pair of plows at the rear of the tractor, and toprovide suitable controls thereto.

Another object is to provide a power lift to operate the controls.

Further objects and advantages of the invention will become apparentfrom a consideration of the following detailed description taken inconnection with the accompanying drawings wherein a satisfactoryembodiment of the invention is shown. However, it is to be understoodthat the invention is not limited to the details disclosed but includesall such variations and modifications as fall within the spirit of theinvention.

Referring to the drawings, Fig. 1 shows a, fragmentary right sideelevational view of a tractor embracing the invention; Fig. 2 is afragmentary view of the invention showing the left side.

The tractor comprises in general an engine portion ill, a transmissionsection I I and a rear axle portion l2 united as is common to form thebody of the tractor, and to which are connected the various implementswhich the tractor is to propel.

The present invention deals with implements which will be carried by thetractor and which may be raised and lowered and incidental to thisfunction a yoke member generally designated as I 3 is pivotally mountedpreferably astride a mid portion II on pintles l5-l5, so as to berockable fore-and-aft for controlling the position of the implements.

Yoke I3 is preferably rocked by power derived from the tractor engine,and for this purpose'a hydraulic cylinder I6 is pivotallymounted on midportion H and has a ram lGa acting forwardly on a pivot carried by yokeI 3. Fluid for actuating the ram "5 may be obtained in the well knownmanner by use of a suitable pump and need not be further described.

The present invention concerns the mounting of plows and theiroperation, and such arrangee ment will now be described. A bell crank I1is mounted on mid portion II and which connects in turn with yoke memberl3 by a link l8 as shown in Fig. 1. I

In the present instance the tractor carries and actuates plows includingshare portions l9 and carried by beams 2| and 22. These beams are spacedapart by a spreader 23, the assem blage being drawn by the tractor andlifted when necessary by means of a lifting arm 24. Arm 24 is pivoted at25 on the tractor and has an upstanding arm 26 pivotally connected at 21with link 28 connected at 29 with above mentioned bell crank l1. Yoke 24is preferably bifurcated and as shown in Fig. 2, also pivoted at 30having an upstanding arm 3| connected in similar manner by a link 32with a, bell'crank 33. It will therefore be apparent that swinging ofyoke I3 will raise or lower yoke 24 thus lifting or lowering plows l9and 20.

Returning to a more detailed description of the plows, a fitting orcross bar 34 is bolted or otherwise solidly fixed with axle portion l2and has a bifurcated portion 35 in which is received a torsion shaft 36.Shaft 35 has a rearwardly extending arm 31 extending beneath axleportion 38 and pivotally connected at 39 with a fitting 40 connectedwith above mentioned beam 22. Pivot 39 is adjustable up and down withrocking of shaft 36 by means of a link 4| connected at 42 with an arm 43of a lever 44 fulengaged beneath axle portion 38. Plate 49 has aquadrant portion 50 to which lever 44 may be engaged and also supportsabove mentioned pivot Pivot point 52 is therefore raised and coincidencewith pivot point 39 by the 3 action of lever 44 so that plow share I9 isadjusted along with share 20. Lever 44 therefore adjusts the plowingdepth of both shares.

As is well known, the tractor ordinarily runs with onftiiiiinitheiurrow;'w iicn 'giyes it a substantial 'tilt" to one side. The"amount of this tilt will change with changes in the depth of plowing.Since it is desirable that the plows themselves shall run level, anadjustment is provided to accommodate this tilting of the tractorwithout corresponding tilting of the plow,

the present instance yoke BI is fixed with above mentioned bar 34 and inwhicl'i'i's'" "engaged aboire mentioned shaft 36, yoke 54 being disposedin the present instance on the left side of the tractor on the sideopposite to above mentioned bifurcated portion 35, At this point shaft351 is connected by a link 55 to an arm 56 of a lever 51. bymearfs of apivot 58. Lever 51 is fulcrumed at 59 in a plate 60 similar in characterto plate 49. Plate Ellis axle portion 6! by bolts 52 -52 and mentionedpivot 30," "Plate till also o d nt portion for retaining lever '51 x dscatterers. As will" be apparent, shift ng or lej ef'fwill rangelower"the left iiIdbf shaftj' 36 and accordingly vary the'angIebtwefiftlie' tractor and the assemblage constitut'cfby beams '2}; 22"and spre'ader' 23.

Yoke 24 is connected by means of a slide fitting irpi'votd "at 65;andarod 65 with a lug 6'!" by meanest a'piVEitBB. Lug 61 is carried by aboveiiien'tibfidspie'ader 23 a d constitutes the means through which yoke'24 raises beams 2i and 22. Rod fifisli'des through fitting 64 and hassprings 69 and engaging abutments H and'lZ on the rod 66 for yieldablymaintaining rod 66 in predetermined'relation to yoke 24. Thus plows l9and 2D arefreeito rise and fall to a certain ex tent so asTto .followtheinequalities of the ground hutfare. controlled somewhat by springs H and12 to? promote'steady running. It will thus be apparent that plows 1,9and are carried and operated, by the tractor and which plows may beraised and lowered by mechanism mounted on the tractor.

What is claimed as new and desired to be seemed J ha ers Ea e o h t d Ss 1. In a tractor haying a longitudinal body porfiPd EWYQ B re we ns rdraft memhcr, supported on said rear axle on the forward side thereoffor oscillating pivotal movemenhand said draft memberbeing also arrangedforfup "ad-sewn dipl cement at "one end, a

arm fixed at one end of camber and extending rearwardly of axle} plowbeam piyotally attached to to be ra n thereby, a second vrearseamenextending he Y9 element 4 wardly extending arm fixed at the other end ofsaid draft member and extending rearwardly of said rear axle, and asecond plow beam pivotally connected to said second rearwardly extendingarm, plows onsaid beams, a depth adjusting lever mounted on thetractofrantl'a connection therefrom to the pivotal connection between the firstmentioned arm and plow beam, a level adjusting leyer mounted on thetractor and a connection to theendof said draft member remote from thefirst mentione ci ar n tor displacing said member I wbeams relativelytotb-e tractor, a yoke journaled for foreand-aft rocking movement at thmid-portion of the tractor, a power; lift element connected with forrole gthe same at will, a lifting pivotall onnected to the tractor andextendingrearwardjly over said plow beams and conneetedfor lifting saidbeams upon rocking of said'liiting element, and a connection from saidyoke to said lifting element for rocking it in respo e t ckinscf ai yoke'2. In a tra or havin a ng tud l b dy 129!- iion n t a sver e rea ax a tnsverses rait m mber supported. on sa drear axl 9 .1 he. 9 ward 's detreof fo osc la in vo a memen a reariziar ly. xte din arm n sa d dra tmember and extending rearwardly of said rear axl a plow. beam p rote lyc nnec ed, qsei ar rearwardl o sa d r a ax nd extend ng ea w r l the efrm a lo r sa d low t ia e h ad u tin ev r wanted on th tract r and a nneo re rqmtc he Pivo al nnes between aid ow eam a d a d arwa ir e55;tending arm for oscillating said draft memiieiin p n t eq ation 9 s evey f ally connected to he mid portion of thetractor fo ior -and-aiirockin mo ement 'm a fs' l cki i at illie li te te i ad yoke for,

m e efl n h yota y connected w the tract and extending rearwardlyover-the plow beam, a om dic? rcin the Hir n ele en i 't 5 beam fo'ft'ng the latter separatin tithe lifting element, and a connection fromsaidyok to said lifting er I t for rocking th latter iii response torocking v if said yoke; l

"ROBERT E. HARTSQCK.

,nrcnnanw'. HENSS.

References Cited in the file of this patent

